Mouth guards, kits, and methods

ABSTRACT

Mouth guards include either an upper member fitting the interior and exterior surfaces of a user&#39;s upper dentition, or a lower member fitting similarly adjacent a user&#39;s lower dentition, or both. The lower member includes molar extensions projecting away from the lower member. The upper member includes upper molar extensions projecting away from the upper member and toward the lower molar extensions so that when the user bites or clenches, the upper right and lower right extensions impinge on one another, as do the molar upper left and lower left extensions. The upper and lower members have an anterior shape to form a gap ranging from about 5 to about 15 mm and sufficient for the user&#39;s tongue to extend into the gap. Methods of using the apparatus and kits as mouth guards.

BACKGROUND INFORMATION Technical Field

The present disclosure relates to mouth guards, kits, and methods.

SUMMARY

In accordance with the present disclosure, oral devices and kits arepresented, as well as methods of using same, which may be used as mouthguards.

A first aspect of the disclosure is a mouth guard comprising at leastone or both of an upper generally arched-shaped member and a lowergenerally arched-shaped member, wherein:

a) the upper generally arched-shaped member is configured to fitadjacent at least a portion of interior and exterior surfaces of auser's upper dentition, the upper generally arched-shaped memberconsisting of a moldable polymeric material;

b) the lower generally arched-shaped member consists of the samemoldable polymeric material that is configured to fit adjacent at leasta portion of interior and exterior surfaces of the user's lowerdentition;

c) the lower generally arch-shaped member comprises a posterior lowerright molar extension and a posterior lower left molar extension eachconsisting of the same moldable polymeric material, the posterior lowerright and the posterior lower left molar extensions formed integrallywith and projecting generally perpendicularly away from the lowergenerally arch-shaped member and generally toward the upper generallyarch-shaped member;

d) the upper generally arch-shaped member comprises a posterior upperright molar extension and a posterior upper left molar extensionconsisting of the same moldable polymeric material, the posterior upperright and posterior upper left molar extensions formed integrally withand projecting generally perpendicularly away from the upper generallyarch-shaped member and generally toward the lower generally arch-shapedmember;

e) so that when the user bites or clenches, the posterior upper rightmolar extension impinges on the posterior lower right molar extension,and the posterior upper left molar extension impinges on the posteriorlower left molar extension;

f) the upper and lower generally arch-shaped members having an anteriorshape to form a gap ranging from about 5 to about 15 mm and sufficientfor at least a portion of the user's tongue to extend forward into thegap without being impeded in forward movement by the apparatus;

g) the posterior lower right molar extension, posterior lower left molarextension, posterior upper right molar extension, and posterior upperleft molar extension each configured such that, when the apparatus is inthe user's mouth, the molar extensions create a tendency to keep theuser's airway open by maintaining the gap.

Any of the apparatus described herein may be part of a kit comprisingone or both upper and lower generally arch-shaped members substantiallyas described herein, in certain embodiments packaged in a carrying case.

A second aspect of the disclosure is a method comprising:

a) inserting one of or both the upper and lower generally arch-shapedmembers into a users mouth and onto the upper and lower dentitions; and

b) a user wearing one or both of the upper and lower generallyarch-shaped members as a mouth guard.

Certain methods may comprise adjusting one or both arch-shaped membersto comfortably fit the user's upper and/or lower dentitions.

Further aspects and advantages of apparatus and methods of the presentdisclosure will become apparent by reviewing the detailed descriptionthat follows.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1, 2, and 3 are various views of one apparatus or kit embodimentwithin the present disclosure;

FIGS. 2A and 2B are views of another apparatus or kit embodiment withinthe present disclosure;

FIGS. 3A and 3B are views of another apparatus or kit embodiment withinthe present disclosure;

FIG. 4 is a schematic side elevation view of an arrangement of magnetsuseful in the apparatus or kit illustrated schematically in FIGS. 1-3 ;

FIGS. 5, 6, and 7 illustrate schematically various views of anotherapparatus or kit embodiment in accordance with the present disclosure;and

FIGS. 8, 9, and 10 illustrate schematically various views of anotherapparatus or kit embodiment in accordance with the present disclosure.

It is to be noted, however, that the appended drawings are not to scaleand illustrate only typical embodiments of this disclosure, and aretherefore not to be considered limiting of its scope, for the apparatus,kits, and methods of the disclosure may admit to other equally effectiveembodiments. Identical reference numerals are used throughout theseveral views for like or similar elements.

DETAILED DESCRIPTION

In the following description, numerous details are set forth to providean understanding of the disclosed oral devices, kits and methods oftheir use. However, it will be understood by those skilled in the artthat the oral devices, kits, and methods covered by the claims may bepracticed without these details and that numerous variations ormodifications from the specifically described embodiments may bepossible and are deemed within the claims. All U.S. published patentapplications and U.S. Patents referenced herein are hereby explicitlyincorporated herein by reference. In the event definitions of terms inthe referenced patents and applications conflict with how those termsare defined in the present application, the definitions for those termsthat are provided in the present application shall be deemedcontrolling.

As used herein the phrase “generally arched-shaped” means the shape of amember resembles an arch in the same way that the upper and lower teethof a user resemble arches. The phrase “adjacent at least a portion ofinterior and exterior surfaces”, as that term is used herein whenreferring to the generally arch-shaped members, means that the generallyarch-shaped members are adjacent to and touching at least one surface ofthe upper or lower teeth concerned, but some “looseness” is allowed, sothat the members may move away from the teeth slightly, for example ifthe material of the member stretches or deforms, such as duringinsertion into or removal from the mouth. As used herein the term “user”means a human or other mammal that employs an apparatus of thisdisclosure in its mouth. The term “subject” may also be used and isconsidered interchangeable with the term “user.”

The present disclosure relates generally to apparatus, kits, and methodsfor use as athletic mouth guards for upper, lower, or both dentitions.

In certain embodiments, the gap (denoted G1 in the various figures) mayhave a distance ranging from about 1 to about 20 mm, or from about 5 toabout 15 mm.

The lateral length (L1 in FIG. 7 ) of the upper and lower molarextensions, i.e., the distance along the molar teeth, may be 10 mm ormore, or may range from 10 to about 50 mm or from about 12 to about 24mm. In certain embodiments having an offset, the length of the upper andthe lower molar extensions may each be about one half of these lengths.In certain embodiments, a goal is to keep the upper and lower molarextensions as short as possible to maintain the gap as large aspossible.

In certain embodiments the molar extensions may have a vertical length(L2 in FIG. 7 ) of 20 mm or less, in certain embodiments 16 mm or less.The average vertical distance of upper and lower molar extensions innon-offset embodiments is about 10 mm (5 mm for upper, 5 mm for lowermolar extensions). In certain embodiments that may have an “offset”,such as may be provided by left and right-side ramps as illustrated inFIGS. 8, 9, and 10 , the upper or lower molar extensions may comprisethe entire vertical length (i.e., all 10 mm may in certain embodimentsbe in the upper molar extensions; in certain other embodiments theentire 10 mm may be in the lower molar extensions). In certainembodiments within the first aspect the upper generally arch-shapedmember comprises two upper molar extensions, one extending from aright-side upper molar region, and the second extending from a left-sideupper molar region. Similarly, in certain embodiments within the secondaspect the upper generally arch-shaped member comprises two lower molarextensions, one extending from a right-side lower molar region, and thesecond extending from a left-side lower molar region.

In certain embodiments the upper and lower members each may comprise amoldable material selected from the group consisting of synthetic andnatural materials. Synthetic materials may be selected from the groupconsisting of polymeric materials, as further discussed herein. Incertain apparatus the arch-shaped members and the molar extensionscomprise a polymeric material.

In certain embodiments, each molar extension may comprise at least onemagnet. In certain embodiments the magnets are embedded in the polymericmaterial of the molar extensions. In certain embodiments, an upper rightmagnet has polarity opposite that of a lower right magnet, and an upperleft magnet has a polarity opposite that of a lower left magnet. Incertain embodiments, the magnets may be flat shaped and embedded intothe plastic of the molar extensions. In certain embodiments, such asillustrated in FIG. 4 , the flat-shaped magnets may have a north pole onone of their major surfaces and a south pole on its other major surface.

Referring to FIGS. 1 and 2 , there is illustrated schematically aperspective view of one apparatus 100 in accordance with the disclosure.Apparatus embodiment 100 includes an upper generally arch-shaped member2 and a lower generally arch-shaped member 4. Upper generallyarch-shaped member 2 includes an exterior wall 8 and an interior wall10, custom-shaped for the user's upper dentition, and which togetherdefine a trough 6 for friction fitting adjacent the upper dentition of auser. An upper connecting portion 12 connects exterior wall 8 andinterior wall 10. Connecting portion 12 may be rather thin or pointed inthe area of the front teeth, and rather flat or planer in the area ofthe back molar teeth. Similarly, lower generally arch-shaped member 4includes an exterior wall 14, and an interior wall 16, the latter beingmostly hidden in the views of FIGS. 1 and 2 . A lower connecting portion18 connects walls 14 and 16, and as with upper connecting portion 12,lower connecting portion 18 may be rather thin or pointed near the frontteeth of the user, and rather flat or planar near the lower molars ofthe user.

As perhaps more clearly viewed in FIG. 2 , embodiment 100 includes alower left molar extension 20 and an upper left molar extension 22, eachextending generally perpendicularly away from their respective members.FIG. 3 illustrates schematically upper generally arch-shaped member 2 ina 180 degree flip from its “in use” position to more clearly illustratea lower right molar extension 24 and an upper right molar extension 26.FIG. 3 also allows viewing of flat-shaped magnets 28, 30, 32 and 34fully embedded in their respective molar extensions. Members 2 and 4, aswell as molar extensions 20, 22, 24, and 26 comprise the same moldablepolymeric material in this embodiment.

As generally may be seen in FIGS. 2 and 3 , and more specificallyillustrated in the schematic diagrams in FIG. 4 , magnets 28 and 30have, in this embodiment, a specific spatial relationship. Therespective north and south poles of these magnets are arranged so thatwhen placed as viewed in FIG. 4 , they will substantially repel oneanother by virtue of their respective magnetic field lines being unableto cross, forcing the mandible down and forward. Magnets 32, 34 may havethe same spatial and magnetic relationship. As this occurs, embodiment100 will tend to keep a user's airway open by creating a gap betweenupper portion 2 and lower portion 4, near the front teeth, as indicatedby double-headed arrow G1 in FIGS. 1 and 2 .

FIGS. 2A and 2B are views of another apparatus or kit embodiment 200within the present disclosure. In embodiment 200, magnets 28A, 28B, 30A,32A, 32B, and 34A are all embedded in their respective molar extensions.In embodiment 200, magnet 28A has a south pole facing away from leftlower molar extension 20, and a north pole facing left lower molarextension 20. Magnet 28B has a south pole facing left lower molarextension 20, and a north pole facing away from left lower molarextension 20. Also in embodiment 200, magnet 32A has a south pole facingaway from right lower molar extension 24, and a north pole facing rightlower molar extension 24. Magnet 32B has a south pole facing right lowermolar extension 24, and a north pole facing away from right upper molarextension 24. Magnet 34A has a south pole facing away from right uppermolar extension 26, and a north pole facing toward right upper molarextension 26. Magnet 30A has a south pole facing away from left uppermolar extension 22, and a north pole facing toward left upper molarextension 22. It is noted that the magnetic poles of each magnet couldbe reversed to arrive at substantially the same embodiment. In bothembodiment 200 and its “reverse” poles sister embodiment, there will bemagnetic attraction between magnets 28B and 30A, as well as betweenmagnets 32B and 34A, while there will be a slight magnetic repulsionbetween magnets 32A and 34A, as well as between magnets 28A and 30A. Inthis embodiment and others like it, the magnetic attraction andrepulsion thus may be adjusted depending on the particular user, forexample the strength of the user's jaw muscles.

FIGS. 3A and 3B are views of another apparatus or kit embodiment 300within the present disclosure. In embodiment 300, magnets 28C, 30C, 32C,and 34B are all embedded in their respective molar extensions. Inembodiment 300, magnet 28C has a south pole facing toward left lowermolar extension 20, and a north pole facing away from left lower molarextension 20. Magnet 32C has a south pole facing right lower molarextension 24, and a north pole facing away from right lower molarextension 24. Also in embodiment 300, magnet 30C has a south pole facingaway from left upper molar extension 22, and a north pole facing leftupper molar extension 22. Magnet 34B has a south pole facing away fromright upper molar extension 26, and a north pole facing right uppermolar extension 26. Magnet 34C has a south pole facing away from rightupper molar extension 26, and a north pole facing right upper molarextension 26. It is noted that the magnetic poles of each magnet couldbe reversed to arrive at substantially the same embodiment. In bothembodiment 300 and its “reverse” poles sister embodiment, there will bemagnetic attraction between magnets 28C and 30C, as well as betweenmagnets 32C and 34B. In this embodiment and others like it, the magneticattractions may be adjusted depending on the particular user, forexample the strength of the user's jaw muscles, by adjusting thestrength of the magnets.

FIGS. 5, 6, and 7 illustrate schematically various views of anotherapparatus embodiment 400 in accordance with the present disclosure,which is the same as embodiment 100 but without magnets. FIG. 7illustrates lengths L1 and L2, as well as gap G1.

FIGS. 8, 9, and 10 illustrate schematically various views of anotherapparatus or kit embodiment 500 in accordance with the presentdisclosure, illustrating an offset or ramp R between upper portion 2 andlower portion 4 created by a left ramp area (RL) and a right ramp area(RR). A tapered lower anterior left molar extension 20A may slidinglymove adjacent a matching tapered upper posterior left molar extension 22in the area of left ramp area RL, where faces of components 20A and 22may slide against each other at an angle α (FIG. 10 ). Similarly on theright side, a tapered lower anterior right molar extension 24A mayslidingly move adjacent a matching tapered upper posterior right molarextension 26 (not viewable in FIGS. 8 and 10 , but illustrated inexploded view of FIG. 9 ). Ramps RL and RR create a tendency for thelower portion 4 to move downward as lower portion 4 moves back towardthe user's throat. Movement of the lower jaw backwards is a naturalmovement during sleep. As this occurs, embodiment 500 will tend to keepthe airway open by creating a gap between upper portion 2 and lowerportion 4, near the front teeth, as indicated by double-headed arrow G1in FIG. 1 . This gap may be important in methods of reducing nasaldrainage, perhaps more important than forward movement of the lower jaw.

The materials of construction of the upper and lower members maycomprise any moldable plastic (polymeric) material that is approved foruse in oral medical devices and appliances for human use and that may becustom fitted for each user and tooth-retained via friction grip, andmaterials approved for animal use. The members may comprise a singlematerial, or combination of materials. The members may comprise morethan one layer of material, and each layer may be the same or different.The polymeric materials may be filled with various fillers, extenders,pigments, and other additives. Suitable polymeric materials includethermoplastics, thermosetting polymers, elastomers, and thermoplasticelastomers. The polymeric materials may comprise co-polymers,ter-polymers, and blends of two or more chemical types of polymers, orblends of two or more polymers of the same chemical type, for example, ablend of two thermoplastics having different molecular weights.

Examples of specific polymers include polyacrylics, polyvinyls,polyvinyl alcohols, and the like. An example of a suitable polymericmaterial is a durable fade-proof acrylic that retains its shape andcolor for at least four-five years. Another example is made of a verypliable, soft, custom-injected silicone. Another example is a polymericmaterial compatible with home/office based bleaching techniques, such asthe material used to make an OSAP device, and materials that can bemolded into a ready-made semi-universal trial version, which may besuitable for patients who cannot endure having their impressions taken.In addition, the trial version is an inexpensive way to test aparticular patients' tolerance to oral therapy. Another example is thematerial used in the device known under the trade designation SAGA. Thisdevice consists of a hard acrylic shell laminated to a soft vinyl liner.Another example is the acrylic material (Bruxeze™) that softens in hotwater to provide a combination of comfort, strength, and retention, andwhich is used in the Adjustable PM Positioner™, an appliance that fitsover all maxillary and mandibular teeth. Another example are thematerials used in the device known as SomnoGuard® AP, which consists ofan upper and a lower tray each made of two materials. The outer trayshells consist of solid clear and transparent medical gradepolycarbonate. The inner lining which accommodates the teeth impressionsis made of a thermoplastic copolymer. After the oral appliance is heatedin a hot water bath its thermoplastic body molds easily to the teeth andjaws allowing any medical doctor to fit the device chair side. Yetanother example is the material employed in the device known asSomnoGuard AP Pro®, which is a dental lab made two-part mandibularadjustable positioner to treat snoring and mild to moderate sleep apnea,and comprises common acrylic/elastomeric thermoform dental materialsavailable in any dental lab after taking impressions of the lower andupper jaws and producing plaster models. Other polymeric materials thatmay be useful include nitinol, silicone, a PET, or any otherbiocompatible polymeric material. Other possible examples include PTFE,e-PTFE, polypropylene, polyurethane, polycarbonate, polyethyleneterephthalate, stainless steel, titanium, tantalum, gold, polyvinidylenefluoride and combinations thereof.

The molar extensions may either be molded using special molds, or builtup by applying a paste or solution of polymeric precursor materials andswabbing the precursors materials on the appropriate areas. In certainembodiments, this may need to be done repeatedly to build up the molarextension to functional length.

Magnets which may be useful in apparatus of this disclosure include rareearth magnets, such as samarium-cobalt and neodymium-iron-boron magnets.It has become possible to produce magnets with small enough dimensionsfor dental applications and yet still provide the necessary forces.Certain embodiments may employ magnets of the “closed field” type. Inthis type of system, a soft magnetic or ferromagnetic material, such asferritic or martensitic stainless steel or Pd—Co—Ni alloy, is implantedinto the jaw, rather than a magnet, to provide attractive force to holdthe denture in place. This implant is known as a “keeper”. In thisconfiguration, the magnetic field lines are shunted through the keeperas it is the path of minimum energy and there is no magnetic fieldexperienced in the oral cavity. U.S. Pat. Nos. 6,659,771, 5,678,998,5,013,243 and 6,299,450 describe small yet powerful magnets forcooperating with a non-magnet implanted “keeper” for denture attachment.The non-magnet keeper is made of a magnet-attracted material, such as asoft magnetic or ferromagnetic material, but is not a permanent magnet.U.S. Pat. No. 4,396,373 describes a removable orthodontic appliancehaving two permanent magnets carried by two caps, respectively, havingfacing poles which are in registry when the mouth is normally closed,exerting a magnetic force in a direction substantially normal to theocclusal plane. The opposing magnets have confronting poles withlike-polarity such that the magnets repel and develop intrusive forcesupon the respective teeth. U.S. Pat. No. 4,671,767 discloses both fixedand removable orthodontic devices that use magnets. The magnets aresecured to removable or fixed orthodontic devices and are positionedbilaterally in the posterior molar regions. The faces of the magnets areoriented such that they repel each other, thereby creating magneticforces parallel to the occlusal plane for urging the mandible forward.

According to U.S. Pat. No. 7,712,468, which discloses a removablemagnetic dental appliance, the magnetic orthodontic devices describedabove employ “open field” magnetic configurations, which are potentiallyharmful to the local tissues in the oral cavity, especially since thedevices are designed for long-term use. Furthermore, the appliances areuncomfortable to wear.

Any of the magnets discussed in these patent and publications would beuseable in apparatus and kits disclosed herein.

If desired, fastening means may be employed to fasten one or more of themembers in the users mouth. Hook and loop fasteners are common andrequire no further explanation. One preferred hook and loop fastener isthat known under the trade designation Velcro®, available from VelcroUSA, Manchester, N.H.

Although the foregoing description is intended to be representative ofapparatus, kits, and methods in accordance with the present disclosure,it is not intended to in any way limit the scope of the appended claims.

What is claimed is:
 1. A mouth guard comprising at least one or both ofan upper generally arched-shaped member and a lower generallyarched-shaped member, wherein: a) the upper generally arched-shapedmember is configured to fit adjacent at least a portion of interior andexterior surfaces of a user's upper dentition, the upper generallyarched-shaped member comprising a moldable polymeric material; b) alower generally arched-shaped member comprising the same or differentmoldable polymeric material that is configured to fit adjacent at leasta portion of interior and exterior surfaces of a user's lower dentition;c) the lower generally arch-shaped member comprising an posterior lowerright molar extension and a posterior lower left molar extension eachcomprising the same or different moldable polymeric material, theposterior lower right and lower left molar extensions formed integrallywith and projecting generally perpendicularly away from the lowergenerally arch-shaped member and generally toward the upper generallyarch-shaped member; d) the upper generally arch-shaped member comprisinga posterior upper right molar extension and a posterior upper left molarextension each comprising the same or different moldable polymericmaterial, the posterior upper right and upper left molar extensionsformed integrally with and projecting generally perpendicularly awayfrom the upper generally arch-shaped member and generally toward thelower generally arch-shaped member; e) so that when the user bites orclenches, the posterior upper right molar extension impinges on theposterior lower right molar extension, and the posterior upper leftmolar extension impinges on the posterior lower left molar extension; f)the upper and lower generally arch-shaped members having an anteriorshape to form a gap ranging from about 1 to about 20 mm and sufficientfor at least a portion of the user's tongue to extend forward into thegap without being impeded in forward movement by the apparatus.
 2. Amethod comprising: a) inserting at least one of the upper and lowergenerally arch-shaped members of claim 1 into the user's mouth andfitting the upper generally arch-shaped member adjacent at least theportion of the interior and exterior surfaces of the user's upperdentition, and fitting the lower generally arch-shaped member adjacentat least the portion of the interior and exterior surfaces of the lowerdentition; and b) the user wearing at least one of the upper and thelower generally arch-shaped members as a mouth guard.
 3. The method ofclaim 2 comprising adjusting the upper generally arch-shaped member tofit adjacent at least the portion of the interior and exterior surfacesof the user's upper dentition, or adjusting the lower generallyarch-shaped member to fit adjacent at least the portion of the interiorand exterior surfaces of user's lower dentition, or adjusting both.
 4. Akit comprising at least one or both the upper and lower generallyarch-shaped members of claim
 1. 5. A mouth guard comprising at least oneor both of an upper generally arched-shaped member and a lower generallyarched-shaped member, wherein: a) the upper generally arched-shapedmember is configured to fit adjacent at least a portion of interior andexterior surfaces of a user's upper dentition, the upper generallyarched-shaped member consisting of a moldable polymeric material; b) thelower generally arched-shaped member consists of the same moldablepolymeric material that is configured to fit adjacent at least a portionof interior and exterior surfaces of the user's lower dentition; c) thelower generally arch-shaped member comprises a posterior lower rightmolar extension and a posterior lower left molar extension eachconsisting of the same moldable polymeric material, the posterior lowerright and the posterior lower left molar extensions formed integrallywith and projecting generally perpendicularly away from the lowergenerally arch-shaped member and generally toward the upper generallyarch-shaped member; d) the upper generally arch-shaped member comprisesa posterior upper right molar extension and a posterior upper left molarextension consisting of the same moldable polymeric material, theposterior upper right and posterior upper left molar extensions formedintegrally with and projecting generally perpendicularly away from theupper generally arch-shaped member and generally toward the lowergenerally arch-shaped member; e) so that when the user bites orclenches, the posterior upper right molar extension impinges on theposterior lower right molar extension, and the posterior upper leftmolar extension impinges on the posterior lower left molar extension; f)the upper and lower generally arch-shaped members having an anteriorshape to form a gap ranging from about 5 to about 15 mm and sufficientfor at least a portion of the user's tongue to extend forward into thegap without being impeded in forward movement by the apparatus; g) theposterior lower right molar extension, posterior lower left molarextension, posterior upper right molar extension, and posterior upperleft molar extension each configured such that, when the apparatus is inthe user's mouth, the molar extensions create a tendency to keep theuser's airway open by maintaining the gap.
 6. The mouth guard of claim 5wherein each molar extension has a lateral length of 10 mm or more. 7.The mouth guard of claim 5 wherein the molar extensions each have avertical height of 5 mm or less.
 8. A kit comprising at least one orboth the upper and lower generally arch-shaped members of claim
 5. 9. Amethod comprising: a) inserting at least one or both of the upper andlower generally arch-shaped members of claim 5 into the user's mouth andfitting the upper generally arch-shaped member adjacent at least theportion of the interior and exterior surfaces of the user's upperdentition, and fitting the lower generally arch-shaped member adjacentat least the portion of the interior and exterior surfaces of the lowerdentition; and b) the user wearing at least one of the upper and thelower generally arch-shaped members as a mouth guard.
 10. The method ofclaim 9 comprising adjusting the upper generally arch-shaped member tofit adjacent at least the portion of the interior and exterior surfacesof the user's upper dentition, or adjusting the lower generallyarch-shaped member to fit adjacent at least the portion of the interiorand exterior surfaces of user's lower dentition, or adjusting both. 11.A mouth guard comprising at least one or both of an upper generallyarched-shaped member and a lower generally arched-shaped member,wherein: a) the upper generally arched-shaped member is configured tofit adjacent at least a portion of interior and exterior surfaces of auser's upper dentition, the upper generally arched-shaped memberconsisting of a moldable polymeric material; b) the lower generallyarched-shaped member consisting of the moldable polymeric material thatis configured to fit adjacent at least a portion of interior andexterior surfaces of the user's lower dentition; c) the lower generallyarch-shaped member consisting of a posterior lower right molar extensionand a posterior lower left molar extension each consisting of themoldable polymeric material, the posterior lower right and the posteriorlower left molar extensions projecting generally perpendicularly awayfrom the lower generally arch-shaped member and generally toward theupper generally arch-shaped member; d) the upper generally arch-shapedmember consisting of a posterior upper right molar extension and aposterior upper left molar extension consisting of the moldablepolymeric material, the posterior upper right and posterior upper leftmolar extensions projecting generally perpendicularly away from theupper generally arch-shaped member and generally toward the lowergenerally arch-shaped member; e) so that when the user bites orclenches, the posterior upper right molar extension impinges on theposterior lower right molar extension, and the posterior upper leftmolar extension impinges on the posterior lower left molar extension; f)the upper and lower generally arch-shaped members having an anteriorshape to form a gap ranging from about 6 to about 8 mm sufficient for atleast a portion of the user's tongue to extend forward into the gapwithout being impeded in forward movement by the apparatus; g) theposterior lower right molar extension, posterior lower left molarextension, posterior upper right molar extension, and posterior upperleft molar extension each configured such that, when the apparatus is inthe user's mouth, the molar extensions create a tendency to keep theuser's airway open by maintaining the gap.
 12. The mouth guard of claim11 wherein each molar extension has a lateral length of 10 mm or more ora vertical height of 5 mm or less.